class Circle {
    private double radius;  
    public Circle(double radius) {
        this.radius = radius;
    }
    public double getPerimeter() {
        double perimeter = 2 * Math.PI * radius;
        return Math.round(perimeter * 100.0) / 100.0;  
    }
    public double getArea() {
        double area = Math.PI * radius * radius;
        return Math.round(area * 100.0) / 100.0;  
    }
    public void display() {
        System.out.printf("半径: %.2f, 周长: %.2f, 面积: %.2f\n", 
                         radius, getPerimeter(), getArea());
    }
}
